Messages in this thread | | | Date | Thu, 17 Nov 2022 20:45:59 -0800 | From | Jakub Kicinski <> | Subject | Re: Missing generic netlink controller operations |
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On Thu, 17 Nov 2022 08:38:40 -0800 Randy Dunlap wrote: > [change linux-netdev@ to netdev@] > > On 11/16/22 19:54, Collin wrote: > > While messing around with libnl and netlink I noticed that despite > > existing in an enum in linux/genetlink.h, the > > CTRL_CMD_{NEW,DEL,GET}OPS operations (and in fact, all operations > > except for > > CTRL_CMD_{NEWFAMILY,DELFAMILY,NEWMCAST_GRP,DELMCAST_GRP}) are > > unimplemented, and have been around, untouched, since the > > introduction of the generic netlink family. Is there a reason these > > exist without implementation, or has it simply not been done?
Only CTRL_CMD_GETMCAST_GRP was never used AFAIU, it was likely added to maintain the triplet cadence (NEW,DEL,GET); probably cargo cult / inspired by the classic netlink / rtnl.
Ops used to be more dynamic, and separately registered, I think. Which found no real life use, so that option was dropped and now all ops must be statically defined for the family at family registration time.
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